A204865 Number of (n+2) X 8 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order.

75595, 603605, 5369493, 48713811, 462259671, 4356486501, 40833480416, 385816144851, 3642440054624, 34249495945028, 323403814654439, 3050971738074998, 28739189960559555, 271179030317522975

Offset

1,1

Comments

Column 6 of A204867.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..0..1..0..1..1..0..1..0....0..0..0..1..0..0..0..0....0..0..0..1..1..0..1..1
..0..1..0..1..1..1..1..1....1..1..0..1..1..0..0..1....1..0..1..1..1..0..0..1
..1..1..0..0..0..0..0..0....1..0..0..1..0..1..1..1....1..1..0..1..0..0..0..1
..1..1..1..1..0..1..0..1....1..0..0..1..1..1..1..0....1..0..0..0..1..0..1..0
..0..0..1..1..0..1..1..1....1..1..0..0..0..0..0..1....0..1..0..1..1..1..1..1

Crossrefs

Sequence in context: A204360 A236817 A140940 * A323025 A323804 A135209

Adjacent sequences: A204862 A204863 A204864 * A204866 A204867 A204868

Keyword

nonn

Author

R. H. Hardin, Jan 20 2012

Status

approved